Simulating and Designing a PLL Frequency Synthesizer for GSM Communications

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  • Author: Samir Kameche, Mohammed Feham & Mohamed Kameche
Phase locked loops (PLL) are used in almost every communication system. Some of the uses include recovering clock from digital data signals, performing frequency, phase modulation and demodulation, recovering the carrier from satellite transmission signals and as a frequency synthesizer. It is very well known that there are many designs in communication that require frequency synthesizers to generate a range of frequencies; such as cordless telephones, mobile radios and other wireless products. The accuracy of the required frequencies is very important in these designs as the performance is based on this parameter.